﻿//-------------------------------------------------------------------------------
// <copyright file="ApiMethodUri.cs" company="TaskyMedia LLC">
//     Copyright (c) TaskyMedia LLC.
// </copyright>
//-------------------------------------------------------------------------------

/*
 * Copyright (c) 2010, TaskyMedia LLC
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 *   Redistributions of source code must retain the above copyright notice, this 
 *     list of conditions and the following disclaimer.
 *   Redistributions in binary form must reproduce the above copyright notice, this
 *     list of conditions and the following disclaimer in the documentation and/or
 *     other materials provided with the distribution.
 *   Neither the name of TaskyMedia LLC nor the names of its contributors may be used
 *   to endorse or promote products derived from this software without specific prior
 *   written permission.
 *   
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE. 
 */

namespace FBOpenGraph
{
    using System;

    /// <summary>
    /// Container class to hold API Method URIs ready to be formatted.
    /// </summary>
    internal class ApiMethodUri
    {
        /// <summary>
        /// Generates OAuth Access Token URI.
        /// </summary>
        /// <remarks>
        /// https://graph.facebook.com/oauth/access_token
        /// </remarks>
        /// <param name="clientId">The Application Client Id.</param>
        /// <param name="clientSecret">The Application Client Secret.</param>
        /// <param name="redirectUri">The redirect URI for post-authorization.</param>
        /// <param name="accessToken">The OAuth access token.</param>
        /// <returns>Returns a URI for the OAuth Access Token API request.</returns>
        public static string GetOAuthAccessToken(string clientId, string clientSecret, string redirectUri, string accessToken)
        {
            return String.Format("https://graph.facebook.com/oauth/access_token?client_id={0}&redirect_uri={1}&client_secret={2}&code={3}", clientId, redirectUri, clientSecret, accessToken);
        }

        /// <summary>
        /// Gets the user information for the specified user.
        /// </summary>
        /// <param name="accessToken">Facebook access token.</param>
        /// <param name="userId">The user Id.</param>
        /// <param name="requestedFields">List of requested profile fields.</param>
        /// <returns>Returns a URI for the User Profile API request.</returns>
        public static string GetUserInformation(string accessToken, string userId, params string[] requestedFields)
        {
            string fieldsList = String.Empty;

            if (requestedFields.Length > 0)
            {
                fieldsList = String.Join(",", requestedFields);
            }

            if (String.IsNullOrEmpty(fieldsList))
            {
                return String.Format("https://graph.facebook.com/{0}?access_token={1}", userId, accessToken);
            }
            else
            {
                return String.Format("https://graph.facebook.com/{0}?access_token={1}&fields={2}", userId, accessToken, fieldsList);
            }
        }
    }
}
